my best friend and i hooked up while he had a girlfriend, and then we did it again when they were broken up but he keeps going back to her and denying it ever happened. its hurting me because i like him too, what do i do?

You need to stop having hookups with him and ask him why it happened. It may have been some sort of rebound or maybe he was using you as a hookup.

-something like my case eh? I WILL FORGET.
6 months of destroying of body gna stop!
honestly, its rather easy.
Chop you up & feed to sharks!